Finding the Fourth Proportional to 9,963.15, 13,748.83 and 5,486.86

Step by Step Solution

1. Step 1: Write the proportion equation
   9,963.15 : 13,748.83 = 5,486.86 : x
2. Step 2: Convert to fraction form
   9,963.15/13,748.83 = 5,486.86/x
3. Step 3: Cross multiply
   9,963.15x = 13,748.83 × 5,486.86
4. Step 4: Simplify right side
   9,963.15x = 75,437,905.37
5. Step 5: Solve for x
   x = 75,437,905.37/9,963.15
6. Step 6: Final answer
   x = 7,571.69